Vejttilatob



J. SYL'VAN.

VENT|LATOR..

APPLICATION FILED JUNE 11. 1919.

1,317,239. PatentedSept. 30, 1919.

i I a i I] in l i L n 5 JOSEPH SYLVAN, OF CHICAGO, ILLINOIS.

VENTILATOR.

Specification of Letters Patent.

Patented Sept. 30, 1919.

Application filed June 11, 1919. Serial No; 303,364.

To all whom it may concern Be it known that I, JOSEPH SYLVAN, a citizen of the United States, and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Ventilators; and Ido hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in ventilators for roofs, skylights and the like, and consists of the matters hereinafter described and more particularly pointed out in the appended claims.

The object of the invention is to provide a simple and efficient ventilator, the parts of which are so constructed and arranged as to increase the updraft and eliminate down draft, as well as to prevent the entrance of snow, rain or other foreign matter through said ventilator into the room or other space to which the ventilator is connected.

In the drawings:

Figure 1 represents a view in perspective of a ventilator embodying my invention.

Fig. 2 represents a vertical sectional view through the ventilator, the plane of the .section being indicated by the line 22 of Fig. 1.

Fig. 3 represents a top plan view of the ventilator.

Fig. 4: represents a horizontal sectional view through the ventilator, the plan of the section being indicated by the line Ar -4: of Fig. 2.

Fig. 5 represents a detail vertical section through a part of the ventilator, the plane of the section being indicated by the line 55 of Fig. 4:.

Referring now to that embodiment of the invention illustrated in the accompanying drawings :10 indicates the tubular stem of the ventilator, and 11 indicates the head of the ventilator which is mounted on the top end of said stem. Said stem is cylindrical in cross section and the bottom end has the usual roof flange (not shown) by means of which the ventilator as a whole is attached in place.

The ventilator head 11 comprises a plurality of vertically disposed vanes 12, each spaced radially outward from and arranged longitudinally of the stem, the bottom edge of each vane 12 extending into a plane below that of the top of the stem. As shown in this particular instance, there are four of said vanes, arranged in oppositely disposed pairs, each vane preferably being of a width less than its height, but greater than the diameter of the stem. Each vane includes a middle part 12 and lateral marginal flanges 12 which are all arranged in the same vertical plane so that each vane is flat, but as is apparent, the flanges 12 may be bent Or curved slightly outwardly from said nnddle part without departing from the spirit of the invention.

Projecting inwardly from the middle part of each vane, are two diverging webs or walls 13 which extend the full height of said vanes, the inner margins of said diverging webs being connected as at 14t to the like margins of the adjacent webs, in the vertical plane of the periphery of the stem 10. Thus, the middle part 12 of each vane, together with the inner surfaces of an associated pair of webs 13, define vertical, open ended, inner passageways 15 which communicate with a space vertically above the top of the stem, and the flanges 12 of each vane, together with the outer faces of the adjacent webs 13 not of the same pair, define vertical, open ended, outer passageways 16 arranged alternately with respect to the passageways 15.

A conical cap 17 is provided at the top of and within the ventilator head 11, said cap comprising downwardly inclined plates 17 each of which is secured to the inner margins of the webs 13 and extends into one of the inner passageways 15, a suitable distance. As shown in this instance, the outer ends of each plate 17 project into a plane spaced outwardly beyond the plane of the periphery of the stem, so as to overhang the same.

Below that part of each cap plate which extends into a vertical passageway 15, is a plurality of vertically spaced deflector plates 18 (see Figs. 2 and 4), each of which is inclined downwardly in parallel relation with respect to the said cap plates. Each deflector plate is secured to the inner mar gins of the associated diverging webs 13 and includes a short upright wall 18 that terminates at its top edge in an outwardly and upwardly bent splash flange 18 To the stem 10 near its top end is secured a plurality of downwardly and" "outwardly extending arcuate deflector plates 19, one.

being arranged in each passageway 15.. I

In the outer passageways 16, defined by the outer surfaces of the webs 13, and-the:

to strike against one of the vanes 12. Such wind as passes the edges of the flanges 12" will enter the outer passageways 16 to be divided by the deflector 20 so that one part thereof will be directed upwardly in said passageway and the other part thereof will be directed downwardly therein. As this wind passes the top and bottom edges of the webs 13, it will 'join with the moving air currents passing over and under the top and bot-tom edges of said vane and create a suction about the top and bottom ends of the inner passageways 15, which being in communication with the, space centrally above the top of said stem, will produce an updraft through the stem and thuswentilate the room or compartment to which the ventilator is connected. Should there be a downward swirl or movement of the passing current of air which would tend to enter the top' end of the inner passageways 15, this air would be deflected outwardly by the cap plates 17 so 'as to follow downwardly through the passage 15 and then out through the open bottom end of said} passageway,

creating a suction in the space above the top of the stem and producing an updraft through said stem. Such part of this clownward current of air as will enter the outer passageways 16, will be deflected outwardly when it strikes the deflector 20 and thus acts to no force and effect.

Should there be an upward; swirlv or movement of the current of air about the bottom of the vanes 12, the arcuate deflectors. 19 will direct suchair outwardly and into the open bottom end of the passageways 15. to pass upwardly theretl'irough and produce a suction which would cause an updraft through the stem. Should'rain or snow enter the ventilator from the top, the cap plates 17 together with the vertically spaced deflectors 18 will prevent the samefrom passing into the topend of the stem.

' It is apparent that by the, construction abovedescribedthere are a plurality of passageways connected with the stem and the combined area of such passageways exceeds presents a substantial.

the area of the stem, so that there is always a maximum of suction maintained to produce the updraft through the stem, and this" without the possibility of downdraft or the entrance of, rain or'snow into said stem.

The parts are so arranged as to brace each other to withstand high wind pressure and make the interior as well as the exterior easily accessible for the purpose of painting.

lVhile in describing my improved ventilator, I have set forth the same as embodying four van-es, it is to be understood that this.

number may be changed without departing from the spirit. of the invention. 1

I claim as my invention:

head, said head consisting of a plurality of vertically arranged vanes spaced outwardly from said stem, with their bottom edges extending into a plane below the top edge of. the stem, a pair of diverging webs extending inwardly from each vane, the nner margins of each web being connected to the inner margins of an adjacent web, in the plane of the periphery of the stem, said vanes and associated'webs defining vertically arranged,

open ended passage-ways which communieate with the space above the top of the stem, and a conical cap arranged centrally above the top of the stem and fixed to the inner margins of said diverging webs.

2. A ventilator comprising a stem anda head, said head consisting of a plurality of vertically arranged vanes spacedoutwardly from said stem, each vane including a middle part and marginal flanges, the bottom:

ends of which extend'into a plane below the top edge of the stem, a pair of diverging webs extending inwardly from the middle part of each-vane, theinner margins of each web being connected to the inner margins of an adjacent web in the plane of the periphcry of the stem, said vanes and associated webs defining vertically arranged, open ended, inner and outer passageways, which inner passageways communicate with the space above the top of the stem, and a. conis calcap arranged centrally above the top of the stem and fixed to the inner margins of said diverging webs.

3. A ventilator comprising a stem and a head, said head consisting of a plurality of vertically arranged vanes spaced outwardly 1. A ventilator comprising a stem and a from said stein, each vane including a middle part and marginal flanges, the bottom ends ofwhich extend intoflaplane below the top edge of the stem, a pair ofjdivergiiig webs extending inwardly from the middle part of each vane, theinner margins of each Web being connected to the inner margins of an adjacent web in the plane of the periphery of the stem, said vanes and associated webs defining vertically arranged open ended, inner and outer passageways, which inner passageways communicate with the space above the top of the stem, a cap arranged centrally above the top of the stem and fixed to the inner margins of said diverging webs and a deflector fixed to the inner margins of an associated pair of webs and extending downwardly and outwardly into an associated inner passageway.

4. A ventilator comprising a stem and a head, said head consisting of a plurality of vertically arranged vanes spaced outwardly from said stem, each vane including a middle part and marginal flanges, the bottom ends of which extend into a plane below the top edge of the stem, a pair of diverging webs extending inwardly from the middle part of each vane, the inner margins of each web being connected to the inner mar gins of an adjacent web in the plane of the periphery of the stem, said vanes and associated webs defining vertically arranged, open ended, inner and outer passageways, which inner passagewayscommunicate with the space above the top of the stem, a cap arranged centrally above the top of the stem and fixed to the inner margins of said diverging webs, and a deflector fixed to the inner margins of an associated pair of webs and extending downwardly and outwardly into an associated inner passageway, each deflector including an upright wall arranged in the vertical plane of the inner marginal edge of the associated web, and each upright wall terminating in an upwardly and out wardly extending splash flange.

5. A ventilator comprising a stem and a head, said head consisting of a plurality of vertically arranged vanes spaced outwardly from said stem, each vane including a middle part and marginal flanges, the bottom ends of which extend into a plane below the top edge of the stem, a pair of diverging webs extending inwardly from the middle part of each vane, the inner margins of each web being connected to the inner margins of an adjacent web in the plane of the periphery of the stem, said vanes and associated webs defining vertically arranged open ended, inner and outer passageways, which inner passageways communicate with the space above the top of the stem, a cap arranged centrally above the top of the stem and fixed to the inner margins of said diverging webs, a deflector fixed to the inner margins of an associated pair of webs and extending downwardly and outwardly into an associated inner passageway and a plurality of downwardly and outwardly extending deflector plates fixed to the top end of the stem, each extending into an associated inner passageway.

6. A ventilator comprising a stem and a head, said head consisting of a plurality of vertically arranged vanes spaced outwardly from said stem, each vane including a middle part and marginal flanges, the bottom ends of which extend into a plane below the top edge of the stem, a pair of diverging webs extending inwardly from the middle part of each vane, the inner margins of each web being connected to the inner margins of an adjacent web in the plane of the periphery of the stem, said vanes and associated webs defining vertically arranged, open ended, inner and outer passageways, which inner passageways communicate with the space above the top of the stem, a cap arranged centrally above the top of the stem and fixed to the inner margins of said' diverging webs, deflector plates fixed to the inner margins of an associated pair of webs and extending downwardly and outwardly into an associated inner passageway, and a deflector in each outer passageway, said deflector being downwardly and outwardly inclined and being fixed to the outer surface of adjacent webs and to the marginal flanges of the adjacent vanes.

7 A ventilator comprising a stem and a head, said head consisting of a plurality of vertical vanes arranged in oppositely disposed pairs, each vane being spaced outwardly from the stem and including a middle part and marginal flanges, the bottom ends of which extend into a plane below the top edge of the stem, a pair of diverging webs extending inwardly from the middle part of each vane, the inner margins of one of said webs being connected to the inner margins of an adjacent Web in the plane of the periphery of the stem, said webs and marginal flanges of the vanes defining inner and outer, open ended, alternate passageways, which inner passageways communicate with the space above the top of the stem, a cap arranged centrally above the top of the stem and fixed to the inner margins of all of said webs, a plurality of deflector plates extending into said inner passageways, and a deflector plate in each outer passageway near the middle thereof.

In testimony that I claim the foregoing as my invention, I affix my signature in thepresence of two witnesses, this 5th day of June A. D. 1919.

JOSEPH S'YLVAN Copies of this patent may be obtained for five cents each, by addressing the Commissioner of .Patents, Washington, D. G. 

